Humorous misspelling of the word "penis." Comes from a translation of a Fate/Stay Night parody comic, where the translators kept the Japanese convention of using circles to edit out certain letters of certain words; the self-censored term for "penis" thus appeared as "p•n•s", and conceivably as "ponos," "pOnOs" or "p0n0s" - all variations which have been used on the internet. Usually used in conjunction with another similarly censored term, vagooo.

Put your ponos up to my vagooo and j-JAM IT IN! (Actual usage from the original Fate/Stay Night parody)

An annoying faggot that makes up shit and lies out of his ass 24/7. Enjoys big cocks and always takes it in the butt. Says he's the shit but never proves himself. Can't do any kind of flip, or even a heel flip, since the pavement is never right. If seen, contact the humane society and report a wild faggot. Hope he gets neutered.

Hey guys did you see pono?

Yeah man, he fucking sucked my dads cock, and then bailed a front flip. What a gay guy.